P0504 - Brake Switch Circuit 'A' / 'B' Correlation

Repair Importance Level: 3/3
Repair Difficulty Level: 1/3  What does this mean?

Possible causes

  • Faulty Brake Lamp Switch
  • Blown Brake Lamp Bulb
  • Blown Brake Lamp Fuse
  • Brake Lamp Switch harness open or shorted
  • Brake Lamp Switch circuit poor electrical connection

Tech notes

Check the Brake Lamp Bulb and Brake Lamp Bulb Fuse first, if the bulb and fuse are OK, then replace Brake Lamp Switch (it is located behind the brake pedal)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0504 Description

In addition to turning on the stop lamp, the stop lamp switch signals are used for a variety of engine, transmission, and suspension functions as well as being an input for diagnostic checks. It is important that the switch operates properly, therefore this switch is designed with two complementary signal outputs: STP and ST1.

The Engine Control Module (ECM) analyzes these signal outputs to detect malfunctions in the stop lamp switch.

OBDII Code P0504 - Brake Switch Circuit 'A' / 'B' Correlation - Engine-Codes.com

P0504 Information for specific makes

P0504 CHRYSLER Brake Switch Circuit 'A' / 'B' Correlation
P0504 DODGE Brake Switch Circuit 'A' / 'B' Correlation
P0504 FORD Brake Switch Circuit 'A' / 'B' Correlation
P0504 HYUNDAI Brake Switch 'A' / 'B' Correlation   
P0504 JEEP Brake Switch Circuit 'A' / 'B' Correlation
P0504 KIA Brake Switch 'A' / 'B' Correlation   
P0504 LEXUS Brake Switch Circuit 'A' / 'B' Correlation
P0504 LINCOLN Brake Switch Circuit 'A' / 'B' Correlation
P0504 MERCURY Brake Switch Circuit 'A' / 'B' Correlation
P0504 SCION Brake Switch Circuit 'A' / 'B' Correlation
P0504 SUZUKI Brake Switch Circuit 1-2' Correlation
P0504 TOYOTA Brake Switch Circuit 'A' / 'B' Correlation
Repair Importance Level: 3
1=Low 2=Medium 3=High  
Repair Difficulty Level: 1
1=Easy 2=Moderate 3=Hard  
Browse All Codes For Specific Model YearBeta
Ford F150 1998 Ford F150
1999 Ford F150
2000 Ford F150
2001 Ford F150
2002 Ford F150
2003 Ford F150
Ford Fusion 2006 Ford Fusion
2007 Ford Fusion
2008 Ford Fusion
2009 Ford Fusion
2010 Ford Fusion
2011 Ford Fusion
2012 Ford Fusion
Honda Accord 2008 Honda Accord
2009 Honda Accord
2010 Honda Accord
Honda Civic 1996 Honda Civic
1997 Honda Civic
1998 Honda Civic
1999 Honda Civic
2000 Honda Civic
Infiniti G35 2003 Infiniti G35
2004 Infiniti G35
2005 Infiniti G35
2006 Infiniti G35
Nissan Altima 2002 Nissan Altima
2003 Nissan Altima
2004 Nissan Altima
2005 Nissan Altima
2006 Nissan Altima
2008 Nissan Altima
2009 Nissan Altima
2010 Nissan Altima
2011 Nissan Altima
2012 Nissan Altima
Nissan Maxima 2005 Nissan Maxima
2006 Nissan Maxima
2007 Nissan Maxima
2008 Nissan Maxima
Nissan Pathfinder 2005 Nissan Pathfinder
2006 Nissan Pathfinder
2007 Nissan Pathfinder
2008 Nissan Pathfinder
2009 Nissan Pathfinder
2010 Nissan Pathfinder
2011 Nissan Pathfinder
2012 Nissan Pathfinder
Nissan Rogue 2008 Nissan Rogue
2009 Nissan Rogue
2010 Nissan Rogue
2011 Nissan Rogue
2012 Nissan Rogue
2013 Nissan Rogue
Nissan Sentra 2002 Nissan Sentra
2003 Nissan Sentra
2004 Nissan Sentra
2005 Nissan Sentra
2006 Nissan Sentra
2007 Nissan Sentra
2008 Nissan Sentra
2009 Nissan Sentra
2010 Nissan Sentra
2011 Nissan Sentra
2012 Nissan Sentra
Toyota Camry 1997 Toyota Camry
1998 Toyota Camry
1999 Toyota Camry
2000 Toyota Camry
2001 Toyota Camry
2006 Toyota Camry
2007 Toyota Camry
2008 Toyota Camry
2009 Toyota Camry
2010 Toyota Camry
2011 Toyota Camry
Toyota Corolla 2005 Toyota Corolla
Toyota Highlander 2001 Toyota Highlander
2002 Toyota Highlander
2003 Toyota Highlander
2004 Toyota Highlander
2005 Toyota Highlander
2006 Toyota Highlander
2007 Toyota Highlander
Toyota Prius 2004 Toyota Prius
2005 Toyota Prius
2006 Toyota Prius
2007 Toyota Prius
2008 Toyota Prius
2009 Toyota Prius
Scion xB 2005 Scion xB
2006 Scion xB
2007 Scion xB